According to mycred40 offer it can NOT be used in conjunction to other offer. So it will never be a 90% discount.
Next text was taken from your offer:
myCred Coupon Code
The only reliable myCred coupon code in the market!
Happy Holidays!
Get 40% off at mycred.me until midnight PST, November 30.
Enter coupon* code: mycred40 at checkout.
*Coupon valid on new purchases. Product subscriptions renew at regular price after the first year.
Cannot be used for renewals or in conjunction with other promotions.